from a scientific, but everything else you heard from most of these missions, your reaction to the environment and reaction to things. even things that were said when we left the moon, they come to you because of what you are confronted with. >> heather: explain to us. take us all back there that moment when you first stepped foot on the to the moon surface. what did you see and what did it feel like? >> well, heather, my first step was mine. no matter what a lot of people want to believe, it can never be taken away from me. the fact of life there were other people who stepped, made their first steps on the moon before i did. the one i remember most, more nostalgic step because it was the last flight for far too long in the future was my last steps. i stepped off the surface and onto the ladder and i looked back down on my last steps and i knew i wasn't coming this way again. it wouldn't be me. with the bright earth shining upon me, that is whole another story. it's a very moving experience to be there and look at your identity with reality. we're everything to understand, family love, feeling